The Honda 90380-SB2-003 Self-Lock Nut (Ohashi) is a genuine OEM fastener designed for Honda lawn tractors, riding mowers, and multi-purpose tractors, including the CD2038, H1011, H2013, H2113, H3011, H3013, H4013, H4514, H4518, H5013, H5518, H6522, HT3810, HT3813, HT4213, and RT5000. As a Honda OEM part, it is manufactured to the same standard as the original hardware installed at the factory, ensuring a correct fit without modification. Sourced directly through Honda's authorized parts network, this nut is the reliable choice for any maintenance or repair job on these machines.
Key Features
- Genuine OEM Hardware — manufactured by Honda to match the original nut exactly, so thread engagement and clamping load are consistent with how the machine was built
- Self-Locking Design — the locking feature resists loosening from vibration, maintaining fastener security under the operating conditions Honda tractors and mowers encounter
- Broad Honda Fitment — listed for the CD2038, H-series, HT-series, H5000-series multi-purpose tractors, and the RT5000, covering a wide range of Honda residential and commercial outdoor power equipment
- Verify by Serial Number — Honda updates part supersessions at specific serial breaks, so confirm your machine's serial number against the fitment table before ordering to ensure this is the correct nut for your unit
A self-locking nut incorporates a locking element — typically a nylon insert or a deformed thread section — that grips the bolt threads and resists rotation caused by vibration or dynamic loads. On Honda lawn tractors, riding mowers, and multi-purpose tractors, fasteners are subject to continuous engine and drivetrain vibration during operation, and a nut that works loose can allow components to shift or separate. Using the correct OEM self-locking nut, such as part number 90380-SB2-003, ensures the joint retains its clamping force through normal service cycles. Replacing worn or damaged hardware with the original-specification fastener restores the integrity of the connection and keeps the assembly performing as Honda intended.
Part Details
| Part Number | 90380-SB2-003 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Self-Lock Nut (Ohashi) |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Compact Tractor | H6522 | All |
| Lawn Tractor | HT3810, HT3813, HT4213 | 5106934-9999999 |
| Lawn Tractor | CD2038, H2013, H2113, H4013, H4514, H4518 | All |
| Multi-Purpose Tractor | H5013, H5518, RT5000 | All |
| Riding Mower | H1011, H3011, H3013 | All |
Verify Before You Order
Fitment is machine-number and revision-specific; always confirm your model and serial number against the fitment list.
Why Buy From DHS Equipment
Every part is verified against the manufacturer's part number before it ships, so what you order is what arrives. We carry parts from leading OEM brands and our own DHS Quality Parts line of professional aftermarket components. Need help finding the right part? Our team is available to confirm compatibility whenever you need it. Orders are processed fast to keep your jobs on track. We don't just sell parts. We keep you jobsite ready.
Questions? Contact our team at [email protected] or 866-611-9369 — DHS Equipment is here to help you maintain peak performance.
